Talking about the reverse steps of PCB circuit board

The process of imitating the PCB circuit board is to realize the rapid update and secondary development of various electronic products by extracting some revisions and modifications in the technical data files. According to the document diagram and schematic diagram extracted from the copy board, it can be upgraded and optimized. ! So what are the reverse steps of PCB copy board? I believe many people have doubts. Today, the circuit board manufacturer Xiaobian will answer you one by one!

     The steps of PCB circuit board reverse push are as follows:

     1. Record the relevant details of the pcb board

     Take a pcb board and record the models, parameters and positions of all components on the paper, especially the direction of the diode, the direction of the tertiary tube, and the direction of the notch. A digital camera can be used to take two pictures of the component location. Many circuit boards have higher-level diodes and transistors, and they can't be seen at all if they are not careful;

What are the reverse steps of PCB copying?

     2. Scan the image

     Remove all equipment and remove the tin from the PAD holes. The pcb board was cleaned with alcohol and put into the scanner. When scanning, you need to adjust the scanned pixels slightly to get a sharper image. Lightly polish the upper layer and the bottom layer with water gauze paper until the copper sheet is shiny, put it into the scanner, start PS, and scan the two layers in color;

     3. Correct the image

     Adjust the contrast and brightness of the picture to make the part with copper film and without copper film have a strong contrast, and then change the second picture to black and white to check whether the lines of the circuit board copy board are clear. If not clear, repeat this step;

     4. Check the position coincidence

     Convert two BMP format files into PROTEL format files and PROTEL files respectively. For example, PAD and VIA basically overlap the positions of PAD and VIA through two layers, indicating that the previous steps have been completed. If there is a deviation, repeat the first step. three steps. So copying the PCB circuit board is very patient, because a small problem on the circuit board will affect the quality and matching of the circuit board copy;

     5. Drawing layer

     Convert the BMP of the TOP layer to TOPPCB, pay attention to convert it to the SILK layer, which is the yellow layer, and then you will place the device on the TOP layer according to the drawing. Once you're done drawing, delete the SILK layer. Keep repeating until all layers are drawn;

     6. Check

     Check whether the electronic technical performance of the copy board is the same as that of the circuit board.

     The above is the reverse step of the PCB copy board introduced by the circuit board manufacturer. Hope it helps you after reading it!